Process for the preparation of intermediates useful in the prepa

Details Process for the preparation of intermediates useful in the prepa Process for the preparation of intermediates useful in the prepa

1994-12-23

1996-03-26

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546115, C07D31160, C07D491052

Patent

active

055022200

ABSTRACT:
A process for preparing compounds of the formula ##STR1## where a, b d, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined herein including condensation of a phenol of formula ##STR2## with an acetal of formula ##STR3## in the presence of a catalytic amount of a tertiary amine. The compounds of formula I are intermediates useful in the preparation of pyranyl cyanoguanidine derivatives.

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